[2] A. W. M. Glass:
Polars and their applications in directed interpolation groups. Trans. Amer. Math. Soc., 166 (1972), 1-25.
MR 0295991 |
Zbl 0235.06004
[3] J. Rachůnek:
Prime subgroups of ordered groups. Czech. Math. J. 24 (99), 1974, 541-551.
MR 0357274
[4] F. Šik: On the theory of lattice-ordered groups. Czech. Math. J., 6 (1956), 1-25.
[5] F. Šik:
Die Anwendung der Polarität auf die direkten Produktzerlegungen einer Gruppen. Czech Math. J., 5 (80), 1955, 61-75.
MR 0073594
[6] B. Šmarda:
Polars and x-ideals in semigroups. Math. SIov., 1 (26), 1976, 31-37.
MR 0427506